Vomitus is an unused Quake enemy. It was a large blob that would throw up smaller versions of itself (Spawn) to attack the player. The only information about it comes from the model in Qtest and from a interview focusing on John Romero for Quake's 10th birthday. It did not move until it was shot at. At that point, it behaves exactly like the Spawn; slowly chasing Ranger and doing a benign assault when it arrives just next to him.